The US Constitution is adaptable because the Founding Fathers deliberately made it relatively vague--meaning that they didn't get too specific because they knew it would have to endure in the future, when minds and society would be greatly different. It's also adaptable because it allows for amendments, which keep the document relevant with modern times.
A is the correct answer.
The Reformation was able to be successful because the printing press, in effect, created a network of agitators who read and interacted with other thinkers on how the church needed to be changed.
